“Wozzilroy, as Mr McIlroy has dubbed the couple, can individually expect to double their year’s earnings through sponsorship and endorsement money, but together they are even more marketable,” wrote Kelly.

“As long as their love-in lasts, they are a brand, and that’s good for business. David Beckham and the then Victoria Adams, Posh Spice of the Spice Girls, broke the mould when they first crossed the divide between sports and showbiz in the mid-1990s.

“Mr McIlroy and Ms Wozniacki can have a similar effect because their combined appeal broadens beyond the parameters of their respective sports.

“As “Wozzilroy”, it will be about more than selling golf clubs and tennis racquets. They exude desirable qualities such as youth, romance, athleticism, and success that can be artfully utilised to present blue-chip companies in the best light possible.”

The report also says that jointly marketed, they could boost the endorsement part of their income by 50 per cent in the coming years, according to marketing experts.

McIlroy meanwhile came face to face with his former manager Chubby Chandler on Tuesday for the first time since they parted ways at JFK Airport in New York a fortnight ago.

“We’ve both already moved on,” said Chandler. “We shared a laugh and a couple of jokes, had a chat and were fine, just like I’d knew we would be. I wish Rory nothing but the best and he knows that.”